Add custom fields to creating reviews

[OctoberComstock]

Add support for custom fields when creating reviews.

https://apidocs.yotpo.com/v1.0/reference#creating-reviews-synchronous

[wabakok-zz]

Hi,

We support custom fields in the review create endpoints:

custom_fields": {
"--##custom_field_id##": "empty answers3? empty answers3?",
"--##another_custom_field_id##": "123"

please note that it's a standalone feature that is not available to all Yotpo accounts.